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Finding the Fourth Proportional to 72,280, 99,637.05 and 62,154.19

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Solution

The fourth proportional to 72,280, 99,637.05 and 62,154.19 is: 85,678.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,280 : 99,637.05 = 62,154.19 : x
  2. Step 2: Convert to fraction form
    72,280/99,637.05 = 62,154.19/x
  3. Step 3: Cross multiply
    72,280x = 99,637.05 × 62,154.19
  4. Step 4: Simplify right side
    72,280x = 6,192,860,136.74
  5. Step 5: Solve for x
    x = 6,192,860,136.74/72,280
  6. Step 6: Final answer
    x = 85,678.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.